ASUS - ROG Crosshair X870E Hero vs MSI - MAG B850 Tomahawk
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | ASUS - ROG Crosshair X870E Hero | MSI - MAG B850 Tomahawk |
|---|---|---|
| M.2 slots | 5 | 4 |
| PCIe slots | 4 | 3 |
Between the ROG Crosshair X870E Hero and MAG B850 Tomahawk, the ROG Crosshair X870E Hero comes out ahead in m.2 slots / pcie slots, while the MAG B850 Tomahawk wins on several specs. Overall, the ROG Crosshair X870E Hero scores 70.7 and the MAG B850 Tomahawk scores 65 on our Mars Score.
Which should you buy?
The ROG Crosshair X870E Hero edges ahead on the Mars Score (70.7 vs 65), but the 5.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the ROG Crosshair X870E Hero if you care most about m.2 slots / pcie slots. The biggest gaps in its favor are m.2 slots, pcie slots. The single most decisive one: M.2 slots — 1.00 more. 5 vs 4.
The MAG B850 Tomahawk similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable max memory, ram slots, wi-fi 7, so those specs do not separate the two — focus on the differences below.
Bottom line: the ROG Crosshair X870E Hero is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: ASUS - ROG Crosshair X870E Hero or MSI - MAG B850 Tomahawk?
ASUS - ROG Crosshair X870E Hero leads the current Mars Score by 5.7 points.The more useful decision is the trade-off behind that result: compare m.2 slots against the way you will actually use the product.
Choose ASUS - ROG Crosshair X870E Hero if…
ASUS - ROG Crosshair X870E Hero has the measurable edge on m2 slots, pcie slots.
Choose MSI - MAG B850 Tomahawk if…
MSI - MAG B850 Tomahawk does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why ASUS - ROG Crosshair X870E Hero wins
- ▲M.2 slots — 1.00 more. 5 vs 4.
- ▲PCIe slots — 1.00 more. 4 vs 3.
Why MSI - MAG B850 Tomahawk wins
- No decisive advantages.
Spec comparison
Platform
Expansion
| Spec | ASUS - ROG Crosshair X870E Hero | MSI - MAG B850 Tomahawk |
|---|---|---|
| RAM slots | 4 | 4 |
| Max memory | 192 GB | 192 GB |
| PCIe slots | 4lead | 3 |
| M.2 slotsⓘ | 5lead | 4 |
I/O
| Spec | ASUS - ROG Crosshair X870E Hero | MSI - MAG B850 Tomahawk |
|---|---|---|
| USB ports | 14lead | 10 |
| 2.5GbE LAN | true | true |
| Wi-Fi 7ⓘ | true | true |